Thanks. I felt in the cylinder for the exhaust valve to close, then the intake valve to open and close. That should be tdc, right? I havent found any plugs to remove to look at the flywheel.

I sprayed carb cleaner in the mixer with the throttle open while cranking it over. All i got was was black smoke out of the exhaust.

I reluctantly drained some coolant and removed the bolts from the head. My next step, i guess, is to make sure it isnt a bad head gasket or valves.